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Analysis of Combinatorial miRNA Treatments to Regulate Cell Cycle and Angiogenesis
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Published on: March 30, 2019

Clock controls angiogenesis.

Lasse Dahl Jensen1, Yihai Cao

  • 1Department of Microbiology, Tumor and Cell Biology, Karolinska Institute, Stockholm, Sweden. lasse.jensen@ki.se

Cell Cycle (Georgetown, Tex.)
|January 18, 2013
PubMed
Summary
This summary is machine-generated.

The study reveals that circadian rhythms regulate embryonic vascular development by controlling the vegf gene. Disrupting circadian genes like Bmal1 significantly impacts blood vessel formation in zebrafish embryos.

Keywords:
Bmal1ClockPeriod2VEGFangiogenesiscircadiandevelopmentvasculaturevasculogenesiszebrafish

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Area of Science:

  • Developmental Biology
  • Chronobiology
  • Molecular Biology

Background:

  • Circadian rhythms influence numerous physiological and pathological processes.
  • Embryonic development and disease progression are known to be affected by circadian oscillations.
  • The role of circadian rhythms in developmental angiogenesis remained largely unexplored.

Purpose of the Study:

  • To investigate the role of circadian rhythms in embryonic angiogenesis.
  • To identify specific circadian regulatory genes involved in vascular development.
  • To elucidate the molecular mechanisms linking circadian regulation to angiogenesis.

Main Methods:

  • Utilized a zebrafish embryonic model for studying developmental angiogenesis.
  • Disrupted key circadian regulatory genes, including Bmal1 and Period2.
  • Analyzed gene expression patterns, specifically focusing on the vegf gene and its promoter region.

Main Results:

  • Circadian oscillation was found to control developmental angiogenesis in zebrafish embryos.
  • Disruption of Bmal1 and Period2 genes led to significant alterations in vascular development.
  • The circadian regulator Bmal1 was identified as a direct target of the vegf gene promoter, increasing VEGF expression.

Conclusions:

  • Circadian rhythms play a crucial role in regulating embryonic vascular development.
  • Bmal1 directly influences VEGF expression, linking circadian regulation to angiogenesis.
  • Findings have implications for understanding mammalian developmental angiogenesis and human pathological angiogenesis.